T.
My son is 18 months old and he just went to 1 nap per day for 2 - 3 hours. He also goes to be around 8:30 or so. When we are home on the weekends he will sleep until 8:30 or so.
Let her still take 2 haps, they are so much happier and they will switch over to 1 nap when they are ready.